2. erratic behavior; fickle weather; mercurial twists of temperament; a quicksilver character, cool and willful at one moment, utterly fragile the next.

• 反复无常的行为；易变的天气；反复无常的性情；反复无常的性格，一会儿冷漠、任性，一会儿又彻底的脆弱。收藏指正